Israel has delayed aid into Gaza and kept the enclave's border shut, while re-emergent Hamas fighters were seen executing men in the street, darkening the outlook for US President Donald Trump's plan to end the war.
Israel told the United Nations it will only allow 300 aid trucks - half the agreed number - into Gaza from tomorrow and that no fuel or gas will be allowed into the enclave except for specific needs related to humanitarian infrastructure, according to a note confirmed by the UN.
Olga Cherevko, a spokesperson for the UN Office for the Coordination of Humanitarian Affairs in Gaza, confirmed the UN had received the note from COGAT, the arm of the Israeli military that oversees aid flows into Gaza.
COGAT had said on Friday that it expected about 600 aid trucks to enter Gaza daily during the ceasefire.
Meanwhile, Israeli forces killed six Palestinians in separate incidents, Gaza's civil defence agency said, while the Israeli military reported its troops had opened fire on suspects who approached their positions.
Mahmud Bassal, spokesman for the civil defence agency, which operates as a rescue force under Hamas, said five people were killed as they inspected their homes in the Shujaiya district of Gaza City.
"Israeli quadcopter drones opened fire on civilians inspecting their homes in Shujaiya," Mr Bassal said.
Watch: RTÉ's Deputy Foreign Editor Edmund Heaphy reports from Tel Aviv on the latest developments in Gaza
Trump says Hamas must disarm or be disarmed
US President Donald Trump announced on Truth Social the beginning of phase two of a Gaza deal, after saying all 20 living hostages have been released from Gaza.
Mr Trump also said that he had communicated to Hamas that the militant group must disarm or it will be forced to.
"If they don't disarm, we will disarm them. And it will happen quickly and perhaps violently," Mr Trump said during a meeting at the White House with Argentine President Javier Milei.
"I spoke to Hamas, and I said, you're going to disarm, right? Yes, sir, we're going to disarm. That's what they told me," Mr Trump said, later clarifying that he passed the message through intermediaries.
Mr Trump's comments came amid a darkening outlook for the ceasefire agreement as Israel delays aid and Hamas tightened its grip on the enclave.
Three Israeli officials said Israel had decided to restrict aid into Gaza and delay plans to open the border crossing to Egypt at least through tomorrow, because Hamas had been too slow to turn over bodies of dead hostages.
So far, Hamas has handed over only four coffins of dead hostages, leaving at least 23 presumed dead and one unaccounted for, still in Gaza.
The militant group has said locating the bodies is difficult.
It comes as Hamas swiftly reclaimed the streets of Gaza's urban areas, following the partial withdrawal of Israeli troops last week.
In a video circulated late yesterday, Hamas fighters dragged seven men with hands tied behind their backs into a Gaza City square, forced them to their knees and shot them from behind, as dozens of onlookers watched from nearby shopfronts.
A Hamas source confirmed that the video was filmed yesterday and that Hamas fighters participated in the executions.
Reuters was able to confirm the location by visible geographic features.
Gaza residents said Hamas fighters were increasingly visible, deploying along routes needed for aid deliveries.
Palestinian security sources said dozens of people had been killed in clashes between Hamas fighters and rivals in recent days.
UN and Red Cross call for all aid crossings to be opened
The United Nations and the International Committee of the Red Cross are calling for all crossings into Gaza to be opened to allow desperately needed aid into the war-torn Palestinian territory.
"That's what humanitarians, including ICRC, have been calling for in the last hours is making sure that, because of the huge needs, all entry points can be open," Red Cross spokesperson Christian Cardon told reporters in Geneva.
The UN humanitarian agency's spokesperson Jens Laerke added: "We need all of them open."
The calls come as the White House released the full text of the declaration signed last night in Egypt by the four guarantor countries of the Gaza peace deal.
However, the statement was vague about the path ahead and made no mention of a one- or two-state solution.
Last night, Egypt, Qatar and Turkey committed to supporting and standing behind what it describes as US President Donald Trump's sincere efforts to end the war in Gaza.
The declaration, signed at a brief summit in Sharm el-Sheikh, commits the guarantor countries to implementing the peace deal and ensuring security and opportunity for both Palestinians and Israelis.
It says that Mr Trump's peace deal opens a new chapter for the region defined by hope, security, and a shared vision for peace and prosperity.
Watch: Trump after Gaza deal: 'I don't think there's anything going to get me into heaven'
It acknowledges that "the Middle East cannot endure a persistent cycle of prolonged warfare" and that "the tragedies witnessed over the past two years must serve as an urgent reminder".
But the declaration is a statement of intent rather than a roadmap for how future phases of the deal actually get implemented.
Mr Trump co-chaired the peace summit in Egypt.
"This is a tremendous day for the world, it's a tremendous day for the Middle East," Mr Trump said as more than two dozen world leaders sat down to talk.
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He later declared that the assembled leaders had "achieved what everybody said was impossible".
"At long last, we have peace in the Middle East," Mr Trump said in a speech.
The declaration statement was vague about the path ahead for peace between Israel and its neighbours, including Palestinians, making no mention of a one- or two-state solution.
"We're talking about rebuilding Gaza. I'm not talking about single state or double state or two state," Mr Trump told reporters en route back to the White House.
Egyptian President Abdel Fattah al-Sisi said the Gaza deal "closes a painful chapter in human history" and sets the stage for a two-state solution.
Meanwhile, there is growing consternation in Israel about the fact that Hamas returned only four of the 28 remains of deceased hostages, citing difficulty retrieving their bodies.
The mother of a hostage killed in captivity accused the Israeli government of "betraying" families whose loved ones remain in Gaza.
The Israeli military said the bodies have been identified, including that of a Nepalese student.
In a statement, the military named two of the victims as Guy Iluz, a 26-year-old Israeli, and Bipin Joshi, a 22-year-old student from Nepal.
The names of the other two hostages have not yet been released at the request of their families, the statement added.
Under the first phase of the agreement, Hamas freed all living Israeli hostages yesterday, in exchange for around 2,000 Palestinian prisoners.
However, obstacles remain as Hamas refuses to disarm and Israel has not pledged to fully withdraw from the territory.
Read more:
Trump declares peace - but reality is not that simple
Full text of the Gaza declaration
Additional reporting AFP, Reuters
